From e7be4512b481f03e5062ac09dcbc0f432117d7a9 Mon Sep 17 00:00:00 2001
From: Iván Ávalos <avalos@disroot.org>
Date: Wed, 26 Oct 2022 22:03:22 -0500
Subject: Initial commit

---
 lexer.py  | 41 +++++++++++++++++++++++++++++++++++++
 main.py   | 38 ++++++++++++++++++++++++++++++++++
 symbol.py | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 149 insertions(+)
 create mode 100644 lexer.py
 create mode 100644 main.py
 create mode 100644 symbol.py

diff --git a/lexer.py b/lexer.py
new file mode 100644
index 0000000..7383180
--- /dev/null
+++ b/lexer.py
@@ -0,0 +1,41 @@
+from enum import Enum
+from symbol import LexToken, TablaLex, tokens
+
+t_boolean = 'booleano'
+t_break = 'detener'
+t_char = 'caracter'
+t_double = 'doble'
+t_else = 'si no'
+t_for = 'por cada'
+t_ident = r'[a-zA-Z_][a-zA-Z0-9_]?'
+t_if = 'si'
+t_int = 'entero'
+t_print = 'imprimir'
+t_read = 'leer'
+t_return = 'retorna'
+t_string = 'cadena'
+t_void = 'vacio'
+t_while = 'mientras'
+
+t_boolean_lit = r'verdadero|falso'
+t_char_lit = r'\'[[:print:]]\''
+t_double_lit = r'\d+.\d+'
+t_int_lit = r'\d+'
+t_string_lit = r'"[[:print]]*"'
+
+def inicio_lexer(data):
+    tabla = TablaLex()
+    # booleano ivan = verdadero
+    tabla.insertar(LexToken('BOOLEAN', None, None, 1))
+    tabla.insertar(LexToken('IDENT', 'ivan', None, 1))
+    tabla.insertar(LexToken('=', None, None, 1))
+    tabla.insertar(LexToken('BOOLEAN_LIT', None, True, 1))
+    print (str(tabla))
+
+    ident = tabla.buscar('ivan')
+    print (str(ident))
+    
+    ident.valor = True
+    tabla.actualizar('ivan', ident)
+    ident = tabla.buscar('ivan')
+    print (str(ident))
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..f14a2be
--- /dev/null
+++ b/main.py
@@ -0,0 +1,38 @@
+import sys, getopt
+from lexer import *
+
+def inicio (input_file, output_file):
+    with open(input_file) as f:
+        data = f.read()
+        inicio_lexer (data)
+
+def main(argv):
+    try:
+        opts, args = getopt.getopt(argv[1:], "hi:o:", ["input=", "output="])
+    except getopt.GetoptError as err:
+        print(err)
+        print_help(argv[0]);
+        sys.exit(2)
+
+    input_file = None
+    output_file = None
+    
+    for o, a in opts:
+        if o == "-h":
+            print_help (argv[0])
+        elif o in ("-i", "--input"):
+            input_file = a
+        elif o in ("-o", "--output"):
+            output_file = a
+        else:
+            assert False, "opción desconocida"
+
+    if input_file and output_file:
+        inicio (input_file, output_file)
+
+def print_help (arg0):
+    print("Uso: % s -i entrada.ñ -o salida.ñ" % arg0)
+    print("     % s -h" % arg0)
+        
+if __name__ == "__main__":
+    main(sys.argv)
diff --git a/symbol.py b/symbol.py
new file mode 100644
index 0000000..c8ca424
--- /dev/null
+++ b/symbol.py
@@ -0,0 +1,70 @@
+from enum import Enum
+from dataclasses import dataclass
+from typing import Any
+
+reservadas = [
+    'BOOLEAN',
+    'BREAK',
+    'CHAR',
+    'DOUBLE',
+    'ELSE',
+    'FOR'
+    'IDENT',
+    'IF',
+    'INT',
+    'PRINT',
+    'READ',
+    'RETURN',
+    'STRING',
+    'VOID',
+    'WHILE'
+]
+
+literales = [
+    'BOOLEAN_LIT',
+    'CHAR_LIT',
+    'DOUBLE_LIT',
+    'INT_LIT',
+    'STRING_LIT'
+]
+
+tokens = reservadas + literales + [
+    '{', '}', '(', ')', ',', '\'',
+    '"', ';', '=', '*', '/', '+',
+    '-', '>', '<', '>=', '<=', '&&',
+    '||', '==', '!=', '++', '--', '//'
+]
+
+@dataclass
+class LexToken:
+    tipo: str
+    nombre: str
+    valor: Any
+    numlinea: int
+
+    def __str__(self):
+        return "LexToken(%s,%s,%s,%i)" % (
+            self.tipo, self.nombre, self.valor, self.numlinea
+        )
+
+class TablaLex:
+    def __init__(self):
+        self.tabla = []
+
+    def insertar(self, tok: LexToken):
+        self.tabla.append(tok)
+
+    def buscar(self, nombre: str):
+        return [t for t in self.tabla if t.nombre == nombre][0]
+
+    def actualizar(self, nombre: str, tok: LexToken):
+        for i, t in enumerate(self.tabla):
+            if t.nombre == nombre:
+                self.tabla[i] = tok
+                return
+
+    def __str__(self):
+        output = ""
+        for t in self.tabla:
+            output += str(t) + "\n"
+        return output
-- 
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